SMH -- The role of cow's milk in preventing bowel cancer is set to be revealed through new research at Flinders University in Adelaide. The university said it expected to have clear evidence by the end of the year on the role milk could play in boosting the anti-cancer properties of a natural trace element, selenium. In a human trial already underway, Graeme Young is testing the beneficial impact of selenium when delivered through cow's milk compared with other forms of the dietary supplement.